*{
    margin: 0px;
    padding: 0px;
}
.one{
    height: 41px;
    background-color: #FCFCFC;
    border-top: 3px solid #ff8500;
    border-bottom: 1px solid #edeef0;
}
a{
    text-decoration: none;
    display: inline-block;
    padding: 0px 15px;
    color: #4c4c4c;
    height: 41px;
    line-height: 41px;
    font-size: 16px;
    margin: auto 100px;
}
a:hover{
    background-color: lightslategrey;
}
.two{
    margin-top: 20px;
    width: 400px;
    height: 400px;
    border: 2px solid yellowgreen;

}
img{
    width: 200px;
    height: 200px;
    padding: 100px;
}
.three{
    margin-top: 20px;
    width: 400px;
    height: 400px;
    border: 2px solid deeppink;
    background-image: url('../image/06.jpg');
    background-size:200px 200px;
    background-repeat: no-repeat;
    background-position: center;
}
.father{
     width: 200px;
     height: 200px;
     /*border: 1px skyblue solid;*/
    overflow: hidden;
     background-color:lightcoral;
 }
.son{
    margin-top: 20px;
    width: 100px;
    height: 100px;
    background-color: blueviolet;
}